Show Posts
Pages: 1 2 3 [4] 5 6 ... 169
46  Community / Website and Forum / Is arduino forum under stress? on: July 04, 2014, 07:15:59 am
I have noticed the last few days that the forum feels a bit slow and clunky when connected from both work and home and was wondering if there is a reason for this.
Sometimes pages are very slow to load or don't load at all.
Sometimes I have difficulty logging in.
Today I have noticed several posts with user details missing.

Have others experienced this same problems in the last week?
47  Using Arduino / Motors, Mechanics, and Power / Re: preference saving on: July 01, 2014, 11:37:15 am
To be able to return to previous/stored setting you need some form of feedback from either the motors or the table width/height. Feedback from the motors could be counting steps (if they are stepper motors), shaft encoder to count shaft rotations or a simple motor on time dureation if the travel is pretty liner. You would also need some end stop switches to prevent over travel and to act as a reference (home) position.
To have feedback from the table could be liner encoders or some form of potentiometer arrangement.
48  Using Arduino / Networking, Protocols, and Devices / Re: Read and Write with SPI 8bit , 7bit ? on: July 01, 2014, 03:45:09 am
From the data sheet it looks like you will need a SPI.setDataMode(SPI_MODE3)  just after the SPI.begin in your sketch.
49  Using Arduino / Networking, Protocols, and Devices / Re: Problem with Range extender on: July 01, 2014, 03:37:29 am
This sounds more like a problem for TP-Link people to answer.
50  Development / Other Software Development / Re: Multiple sketchbook locations on: June 30, 2014, 03:17:25 am
You are a couple steps ahead of me. What is your experience running the IDE in dropbox? Is there any performance issues? I considered moving the IDE but didn't actually do it.
No performance issues as it's all running from the local drive but any changes get synced with the online Dropbox (assuming the program is running). You also get another layer of safety as deleted files that had synced online can be recovered if you log into the web interface.
51  Using Arduino / Sensors / Re: Programming. HELP! on: June 30, 2014, 02:35:57 am
Yes.  I want to write a program that runs on the arduino using c#.
That is a goal that is way beyond me and probably 95% of the people who use this forum.
You would be better off trying to convert the C# to C++ that the Arduino compiler uses or getting a Netduino that you can write C# code for.
52  Using Arduino / Networking, Protocols, and Devices / Re: Long distance SPI? on: June 29, 2014, 11:26:26 am
It looks like you can get RS232 versions and they should probably work over that length of cable and if not then add a 485 or 422 chip at each end and you should be good for 100m +
53  Using Arduino / Project Guidance / Re: Problems with I2C 2004 display on: June 29, 2014, 10:00:56 am
Do you have a link to the i2c backpack your trying to use or at least a good picture. There are several different flavours to be found and it could be as simple as the wrong address your using (use something like this to check) or it could be like mine where the pins between the i2c and the LCD were wired different to the libraries expect.
54  Using Arduino / Installation & Troubleshooting / Re: Stupid Question on: June 29, 2014, 06:28:34 am
Also, about your serial port question, I think could easily transfer the ppt from my usb flashdrive to the computer I'll be using, so the serial port won't be a problem (also, most computers have more than one, so...)
What Rob meant was do you need to use the IDE Serial monitor (or any other serial port control)  to send/receive data to/from the Arduino as you will need drivers to do this.
55  Using Arduino / Programming Questions / Re: Scope on: June 29, 2014, 06:08:59 am
Post the code (or a reduced version) so we can see the problem.
Have you missed a close bracket and both functions run into one another?
56  Using Arduino / Installation & Troubleshooting / Re: Stupid Question on: June 29, 2014, 06:05:13 am
The Arduino should power okay, the drivers are only to allow communication.
57  Using Arduino / LEDs and Multiplexing / Re: MAX7219 display errors on: June 29, 2014, 04:44:13 am
When your displays crash is there a way of resetting them while leaving the clock running?  My clock drives other slave clocks so a power down would  mean all other clocks would need correcting.
The chip does not have a reset pin/command so the only way would probably be to power cycle. It would be interesting to know if the chips SPI interface still works when it locks up.
What decoupling do you currently have? I use a 10uF & 0.1uF shared between both chips but it should really have been per chip.
Could you control the MAX7219 power through an Arduino digital pin & a transistor an periodically reset it that way and then bring it out of shutdown to continue displaying.
58  Development / Other Software Development / Re: Multiple sketchbook locations on: June 29, 2014, 03:52:21 am
I know that most Arduino code is not confidential but the idea of saving any of my personal stuff on someone else's computer seems like madness to me.

How would you know if the Mafia (from whatever country) bought out the company that owns the servers?
Dropbox is purely for my personal code and makes life a lot easier when writing code at work, home & laptop. The number of times I had written code at work and forgot to copy to USB to bring home prompted my current scheme. Work developed code is written on  PC's that have no internet access.
59  Using Arduino / Programming Questions / Re: Detecting available space in Serial transmit buffer on: June 29, 2014, 03:46:26 am
It seems to be working, but I'm still not 100% confident this code is correct, especially for the case of the buffer being entirely full.
What bit size is an int on the Teensy? You use uint32_t to calculate space but return result as in int.
60  Using Arduino / LEDs and Multiplexing / Re: MAX7219 display errors on: June 29, 2014, 03:37:25 am
Not a solution but my Wordclock that uses 2x MAX7219's to drive a 16x8 LED matrix, sometimes (about 2-3 times a year) has half the matrix crash/freeze as your describe. I wondered if it's power spikes as I had seen it happen once while plugging in a phone charger into another gang of the mains socket the clock in in. It does not happen enough for me to go to the hassle of adding extra decoupling to see if it fixes it.

Pages: 1 2 3 [4] 5 6 ... 169